Since the new packet flow came in, payload comes at the end so udp
length for instance is known only when we "finalize" the packet.
However such finalization was still under the condition of chksum
offload, like it used to be in the former flow (udp headers were
inserted). This is obviously wrong but that was not caught with
existing driver in master as none of these drivers offloading
chksum calculation.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
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